In this Part, unless the contrary intention appears:
"authorised officer" for an investigatory authority means:
(a) a constable; or
(b) a person authorised to exercise powers under this Part in relation to the authority by:
(i) the Minister ; or
(ii) if the authority has power to administer its own affairs--a person exercising that power on behalf of the authority .
"authority premises" for an investigatory authority means any premises occupied or used (whether permanently or temporarily or under a lease or otherwise) in connection with the sittings, or any other operations, of the authority.
"explosive substance" includes:
(a) any material for making an explosive substance; and
(b) any apparatus, machine, implement or material used, or intended to be used, or adapted, for causing, or aiding in causing, an explosion in or with an explosive substance; and
(c) a part of such an apparatus, machine or implement.
"firearm" means a weapon designed or adapted to discharge shot, a bullet, or any other missile, as a result of the expansion of gases produced in the weapon by the ignition of strongly combustible materials, or by compressed air or other gases, whether stored in the weapon in pressurised containers or produced in the weapon by mechanical means, and includes a part of such a weapon and ammunition for use in such a weapon.
"investigatory authority" means a tribunal, authority or person having power under a law of the Commonwealth to require the production of documents or the answering of questions.
"offensive weapon" means any article:
(a) made or adapted for use for causing injury to, or incapacitating, a person; or
(b) intended by the person having it with him or her, for such use;
and includes a part of such an article.